Sakshi had a mixture of sand and salt. Now Sakshi thought of separating the sand from the salt.How should she do this? [5 MARKS]
Sakshi had a mixture of sand and salt. Now Sakshi thought of separating the sand from the salt.How should she do this? [5 MARKS]
Concept : [1 Mark]
Application : [2 Mark]
Steps : [2 Mark]
Sakshi had a mixture of salt and sand.
Sakshi can separate the mixture by first adding water to the mixture.
Salt is soluble in water, while sand is not. So a solution of salt and water will be formed.
We will now separate the mixture by following the steps given below:
Keep this mixture in a beaker and add some water to it. Leave the beaker aside for some time.
The sand can be separated by decantation or filtration. Now, we need to separate salt and water from the decanted liquid.
Transfer this liquid to a kettle and close its lid.
Heat the kettle for some time. Notice steam coming out from the spout of the kettle.
Take a metal plate with some ice on it. Hold the plate just above the spout of the kettle.
When the steam comes in contact with the metal plate cooled with ice, it condenses and forms liquid water.
The water drops that you observed falling from the plate, were due to condensation of steam.
After all the water has evaporated, salt is left behind in the kettle. In this way, we have separated salt, sand, and water.
Concept : [1 Mark]
Application : [2 Mark]
Steps : [2 Mark]
Sakshi had a mixture of salt and sand.
Sakshi can separate the mixture by first adding water to the mixture.
Salt is soluble in water, while sand is not. So a solution of salt and water will be formed.
We will now separate the mixture by following the steps given below:
Keep this mixture in a beaker and add some water to it. Leave the beaker aside for some time.
The sand can be separated by decantation or filtration. Now, we need to separate salt and water from the decanted liquid.
Transfer this liquid to a kettle and close its lid.
Heat the kettle for some time. Notice steam coming out from the spout of the kettle.
Take a metal plate with some ice on it. Hold the plate just above the spout of the kettle.
When the steam comes in contact with the metal plate cooled with ice, it condenses and forms liquid water.
The water drops that you observed falling from the plate, were due to condensation of steam.
After all the water has evaporated, salt is left behind in the kettle. In this way, we have separated salt, sand, and water.
